The Chemistry (School & UG) category covers the fundamental to advanced concepts of Chemistry , structured to support Class 11–12 students, competitive exam aspirants, and undergraduate learners . The content emphasizes conceptual clarity, problem-solving skills, and strong alignment with NCERT and university syllabi .
In this category, you will study:
Physical Chemistry – atomic structure, thermodynamics, chemical kinetics, equilibrium, electrochemistry, and solutions
Organic Chemistry – basic principles, reaction mechanisms, hydrocarbons, functional groups, biomolecules, and polymers
Inorganic Chemistry – periodic trends, chemical bonding, coordination compounds, metallurgy, and s-, p-, d-, and f-block elements
Numerical problem-solving – formula-based calculations, mole concept, and graph-based questions
Reaction mechanisms and derivations with step-by-step explanations
Comparisons, trends, and exceptions important for exams
NCERT-based theory , supported by diagrams, tables, MCQs, assertion–reason questions, numericals, and PYQs
The content is designed to build strong foundations , improve analytical and quantitative skills , and prepare students for school examinations, competitive exams, and undergraduate assessments .
Develop a clear, logical, and application-oriented understanding of Chemistry to excel academically and confidently tackle problem-based and conceptual questions at both school and UG levels .
Q. What is the major product of the elimination reaction of 2-bromobutane with a strong base?
A.
Butene
B.
2-butene
C.
1-butene
D.
Butyne
Show solution
Solution
The major product of the elimination of 2-bromobutane with a strong base is butene, specifically 2-butene due to the more stable alkene formation.
Correct Answer:
B
— 2-butene
Learn More →
Q. What is the major product of the following reaction: CH3Br + NaOH (ethanol)?
A.
CH3OH
B.
CH3O-Na+
C.
CH3-NaBr
D.
CH3-CH2-OH
Show solution
Solution
The reaction is an SN2 substitution where the nucleophile (OH-) attacks the carbon bonded to Br, resulting in the formation of CH3OH.
Correct Answer:
A
— CH3OH
Learn More →
Q. What is the major product of the hydration of propene in the presence of sulfuric acid?
A.
Propan-1-ol
B.
Propan-2-ol
C.
Propanoic acid
D.
Propyl sulfate
Show solution
Solution
The major product of the hydration of propene is propan-2-ol due to Markovnikov's rule.
Correct Answer:
B
— Propan-2-ol
Learn More →
Q. What is the major product of the reaction between 1-bromopropane and sodium hydroxide in an aqueous solution?
A.
1-Propanol
B.
2-Propanol
C.
Propene
D.
No reaction
Show solution
Solution
The reaction is a nucleophilic substitution (SN2) where sodium hydroxide replaces the bromine atom, resulting in 1-Propanol.
Correct Answer:
A
— 1-Propanol
Learn More →
Q. What is the major product of the reaction between 1-bromopropane and sodium hydroxide in ethanol?
A.
Propene
B.
1-Propanol
C.
2-Propanol
D.
No reaction
Show solution
Solution
The major product is 1-Propanol, as the reaction proceeds via an SN2 mechanism leading to the formation of an alcohol.
Correct Answer:
B
— 1-Propanol
Learn More →
Q. What is the major product of the reaction between 1-butene and H2 in the presence of a catalyst?
A.
1-butene
B.
2-butene
C.
Butane
D.
Cyclobutane
Show solution
Solution
The hydrogenation of 1-butene leads to the formation of butane as the major product.
Correct Answer:
C
— Butane
Learn More →
Q. What is the major product of the reaction between 1-butene and HBr?
A.
1-bromobutane
B.
2-bromobutane
C.
3-bromobutane
D.
butane
Show solution
Solution
The reaction follows Markovnikov's rule, where HBr adds across the double bond, leading to the formation of 2-bromobutane as the major product.
Correct Answer:
B
— 2-bromobutane
Learn More →
Q. What is the major product of the reaction between 1-butyne and H2 in the presence of a catalyst?
A.
Butane
B.
Butene
C.
Cyclobutane
D.
1-Butyne
Show solution
Solution
The hydrogenation of 1-butyne in the presence of a catalyst produces butane as the major product.
Correct Answer:
A
— Butane
Learn More →
Q. What is the major product of the reaction between 1-butyne and HBr?
A.
1-bromobutane
B.
2-bromobutane
C.
butane
D.
bromobenzene
Show solution
Solution
The addition of HBr to 1-butyne follows Markovnikov's rule, leading to the formation of 2-bromobutane.
Correct Answer:
B
— 2-bromobutane
Learn More →
Q. What is the major product of the reaction between 2-bromobutane and potassium tert-butoxide?
A.
2-butene
B.
1-butene
C.
tert-butyl bromide
D.
butane
Show solution
Solution
The major product is 2-butene, as potassium tert-butoxide promotes elimination (E2) leading to the formation of an alkene.
Correct Answer:
A
— 2-butene
Learn More →
Q. What is the major product of the reaction between propene and bromine?
A.
1-bromopropane
B.
2-bromopropane
C.
1,2-dibromopropane
D.
No reaction
Show solution
Solution
The reaction of propene with bromine results in the formation of 1,2-dibromopropane through an addition reaction.
Correct Answer:
C
— 1,2-dibromopropane
Learn More →
Q. What is the major product of the reaction between propene and HBr?
A.
1-bromopropane
B.
2-bromopropane
C.
Bromopropane mixture
D.
No reaction
Show solution
Solution
The major product is 2-bromopropane due to Markovnikov's rule, where H adds to the less substituted carbon.
Correct Answer:
B
— 2-bromopropane
Learn More →
Q. What is the major product of the reaction of 1-bromo-2-methylpropane with sodium hydroxide in ethanol?
A.
1-methylpropene
B.
2-methylpropene
C.
2-bromopropane
D.
1-bromopropane
Show solution
Solution
The reaction is an elimination reaction (E2) leading to the formation of 2-methylpropene as the major product.
Correct Answer:
B
— 2-methylpropene
Learn More →
Q. What is the major product of the reaction of 1-butyne with HBr?
A.
1-bromobutane
B.
2-bromobutane
C.
butane
D.
bromobenzene
Show solution
Solution
The reaction of 1-butyne with HBr follows Markovnikov's rule, leading to the formation of 2-bromobutane.
Correct Answer:
B
— 2-bromobutane
Learn More →
Q. What is the major product of the reaction of 1-chloropropane with sodium hydroxide in an SN2 mechanism?
A.
1-propanol
B.
2-propanol
C.
Propyl chloride
D.
Sodium chloride
Show solution
Solution
The reaction of 1-chloropropane with sodium hydroxide in an SN2 mechanism results in the formation of 1-propanol through nucleophilic substitution.
Correct Answer:
A
— 1-propanol
Learn More →
Q. What is the major product of the reaction of 1-pentene with H2 in the presence of a palladium catalyst?
A.
Pentane
B.
1-pentanol
C.
2-pentanol
D.
Cyclopentane
Show solution
Solution
The reaction is a hydrogenation that converts 1-pentene to pentane, a saturated hydrocarbon.
Correct Answer:
A
— Pentane
Learn More →
Q. What is the major product of the reaction of 2-bromo-2-methylpropane with a strong base?
A.
2-methylpropene
B.
2-bromo-2-methylpropane
C.
Isobutylene
D.
No reaction
Show solution
Solution
The strong base induces an E2 elimination reaction, leading to the formation of 2-methylpropene as the major product.
Correct Answer:
A
— 2-methylpropene
Learn More →
Q. What is the major product of the reaction of 2-methyl-2-bromopropane with KOH?
A.
2-methylpropene
B.
2-bromopropene
C.
2-methyl-2-propanol
D.
No reaction
Show solution
Solution
The reaction favors elimination due to the bulky substrate, leading to the formation of 2-methylpropene.
Correct Answer:
A
— 2-methylpropene
Learn More →
Q. What is the major product of the reaction of 2-methylpropene with H2 in the presence of a platinum catalyst?
A.
2-methylpropane
B.
2-methylpropene
C.
Cyclopropane
D.
No reaction
Show solution
Solution
The reaction of 2-methylpropene with H2 in the presence of a platinum catalyst results in the hydrogenation of the alkene to form 2-methylpropane.
Correct Answer:
A
— 2-methylpropane
Learn More →
Q. What is the major product of the reaction of 2-methylpropene with HBr?
A.
2-bromopropane
B.
1-bromopropane
C.
3-bromopropane
D.
2-bromo-2-methylpropane
Show solution
Solution
The major product is 2-bromopropane due to Markovnikov's rule, where the bromine adds to the more substituted carbon.
Correct Answer:
A
— 2-bromopropane
Learn More →
Q. What is the major product of the reaction of 2-pentene with HBr?
A.
1-bromopentane
B.
2-bromopentane
C.
3-bromopentane
D.
bromopentane
Show solution
Solution
The addition of HBr to 2-pentene follows Markovnikov's rule, leading to the formation of 2-bromopentane.
Correct Answer:
B
— 2-bromopentane
Learn More →
Q. What is the major product of the reaction of benzene with bromine in the presence of FeBr3?
A.
Bromobenzene
B.
Benzyl bromide
C.
Phenol
D.
Benzene dibromide
Show solution
Solution
The reaction is an electrophilic aromatic substitution, resulting in the formation of bromobenzene as the major product.
Correct Answer:
A
— Bromobenzene
Learn More →
Q. What is the major product when 2-methylpropene reacts with H2 in the presence of a catalyst?
A.
2-methylpropane
B.
2-methylpropan-1-ol
C.
Propane
D.
2-methylpropan-2-ol
Show solution
Solution
The hydrogenation of 2-methylpropene results in the saturation of the double bond, yielding 2-methylpropane as the major product.
Correct Answer:
A
— 2-methylpropane
Learn More →
Q. What is the major product when 2-methylpropene reacts with H2O in the presence of an acid?
A.
2-methylpropan-2-ol
B.
2-methylpropan-1-ol
C.
2-methylpropanoic acid
D.
2-methylpropene
Show solution
Solution
The major product is 2-methylpropan-2-ol due to Markovnikov's rule, where water adds to the more substituted carbon.
Correct Answer:
A
— 2-methylpropan-2-ol
Learn More →
Q. What is the major product when anisole (methoxybenzene) undergoes nitration?
A.
Nitroanisole (ortho)
B.
Nitroanisole (para)
C.
Dinitroanisole
D.
Anisole
Show solution
Solution
The major product is para-nitroanisole due to the electron-donating effect of the methoxy group, which directs the electrophile to the para position.
Correct Answer:
B
— Nitroanisole (para)
Learn More →
Q. What is the major product when phenol is treated with bromine water?
A.
Bromobenzene
B.
2-bromophenol
C.
4-bromophenol
D.
Bromophenol
Show solution
Solution
Phenol reacts with bromine water to predominantly form 2-bromophenol due to the activating effect of the hydroxyl group.
Correct Answer:
C
— 4-bromophenol
Learn More →
Q. What is the maximum number of electrons that can occupy the 3d subshell?
Show solution
Solution
The maximum number of electrons in a subshell is given by 2n^2. For d (n=3), it is 2(3^2) = 18, but only 10 can occupy 3d.
Correct Answer:
C
— 10
Learn More →
Q. What is the maximum number of electrons that can occupy the n=2 energy level?
Show solution
Solution
The maximum number of electrons in an energy level is given by the formula 2n^2. For n=2, it is 2(2^2) = 8.
Correct Answer:
C
— 8
Learn More →
Q. What is the maximum number of stereoisomers for a compound with two chiral centers?
Show solution
Solution
The maximum number of stereoisomers for a compound with n chiral centers is given by 2^n. For 2 chiral centers, it is 2^2 = 4.
Correct Answer:
B
— 4
Learn More →
Q. What is the maximum number of unpaired electrons in a nitrogen atom?
Show solution
Solution
Nitrogen has three unpaired electrons in its 2p orbitals (1s2 2s2 2p3).
Correct Answer:
C
— 3
Learn More →
Showing 781 to 810 of 1878 (63 Pages)